Another one of my many fantasies, (I do seem to have quite a bit of them, you know), is teaching a young girl self-defense. Of course, this includes "ballbusting".
I take her into a bedroom, and instruct her to take off ALL of her clothes. She objects, but I tell her that I'm the teacher, and that if she trusts me, she'll do EVERYTHING I instruct her to. She then takes off all of her clothes, and I take off all of mine. The lesson then begins.
I tell her to come up to hug me, then lift her knee into my balls. She does this SLOWLY, because if she did this fast I would be on the ground in a lot of pain! I teach her to ruthless, as her attacker most likely will be. I teach her kicking techniques, punching techniques, chopping, humiliation techniques like face slapping and what to say verbally to her attacker - positive re-enforcement to boost her confidence and lower that of her attacker.
Then I teach her techniques for when her attacker is on the ground; what she can do next. This is usually going for the "knockout", either by blows to the face/head or, more likely, spreading the legs of her attacker and stomping him until he passes out unconsious.
The final part of the lesson involves taking a "souvenir" from your attacker; usually ********** of the attacker, OR something more legal - probably identification taken from your attacker; drivers license or blood sample or something like that. I tell her that if the cops find her with the balls of her attacker - oops! get a good lawyer, cuz this one's going to court!
After the lesson, I ask her to pay her "tuition". The tuition is MY PLEASURE - which I'm sure you can figure out by now. After that, I ask if she would like to practice what I've just taught her. She says she does. And that's good, because after all - practice makes perfect.